Nissan Qashqai J11. Manual — part 352
IGNITION SIGNAL
ECM-385
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
IGNITION SIGNAL
Component Function Check
INFOID:0000000010703070
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
2.
CHECK IGNITION SIGNAL FUNCTION-1
With CONSULT
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” with CONSULT.
2.
Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
3.
CHECK IGNITION SIGNAL FUNCTION-2
Without CONSULT
1.
Let engine idle.
2.
Read the voltage signal between ECM harness connector terminals with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010703071
1.
CHECK CONDENSER POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between condenser harness connector and ground.
Is the inspection result normal?
ECM
Voltage signal
+
−
Connector
Terminal
Connector
Terminal
F16
78
E57
128
82
86
90
JPBIA4733ZZ
+
−
Voltage
Condenser
Connector
Terminal
F200
1
Ground
Battery voltage
ECM-386
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
IGNITION SIGNAL
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK CONDENSER POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between IPDM E/R harness connector and condenser harness connector.
4.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
3.
CHECK CONDENSER GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between condenser harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK CONDENSER
Check condenser. Refer to
ECM-190, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace condenser.
5.
CHECK IGNITION COIL POWER SUPPLY
1.
Reconnect all harness connectors disconnected.
2.
Disconnect ignition coil harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ignition coil harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning part.
+
−
Continuity
IPDM E/R
Condenser
Connector
Terminal
Connector
Terminal
F90
96
F200
1
Existed
+
−
Continuity
Condenser
Connector
Terminal
F200
2
Ground
Existed
+
−
Voltage
Ignition coil
Cylinder
Connector
Terminal
1
F24
3
Ground
Battery voltage
2
F25
3
3
F26
3
4
F27
3
IGNITION SIGNAL
ECM-387
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
6.
CHECK IGNITION COIL GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between ignition coil harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace malfunctioning part.
7.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check the continuity between ignition coil harness connector and ECM harness connector.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace malfunctioning part.
8.
CHECK IGNITION COIL WITH POWER TRANSISTOR
Check ignition coil with power transistor. Refer to
ECM-387, "Component Inspection (Ignition Coil With Power
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
Component Inspection (Ignition Coil With Power Transistor)
INFOID:0000000010703072
1.
CHECK IGNITION COIL WITH POWER TRANSISTOR-1
1.
Turn ignition switch OFF.
2.
Disconnect ignition coil harness connector.
3.
Check resistance between ignition coil terminals as per the following.
+
−
Continuity
Ignition coil
Cylinder
Connector
Terminal
1
F24
2
Ground
Existed
2
F25
2
3
F26
2
4
F27
2
+
−
Continuity
Ignition coil
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F24
1
F16
78
Existed
2
F25
1
82
3
F26
1
86
4
F27
1
90
ECM-388
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
IGNITION SIGNAL
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
2.
CHECK IGNITION COIL WITH POWER TRANSISTOR-2
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1.
Reconnect all harness connectors disconnected.
2.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.
3.
Start engine.
4.
After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5.
Turn ignition switch OFF.
6.
Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7.
Remove ignition coil and spark plug of the cylinder to be checked. Refer to
.
8.
Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9.
Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.
CAUTION:
• During the operation, always stay 0.5 m (19.7 in) or more
away from the spark plug and the ignition coil. Be careful
not to get an electrical shock while checking, because the
electrical discharge voltage becomes 20 kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
Component Inspection (Condenser)
INFOID:0000000010703073
1.
CHECK CONDENSER
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Check resistance between condenser terminals as per the following.
Ignition coil
Resistance
Ω
[at 25
°
C (77
°
F)]
+
−
Terminal
1
2
Except 0 or
∞
Ω
3
Except 0
Ω
2
3
Spark should be generated.
JMBIA0066GB
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